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Adam
  • Member for 10 years, 7 months
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38 votes
8 answers
3k views

Is the number 100k+11 ever a square?

16 votes
5 answers
7k views

Why does "the probability of a random natural number being prime" make no sense?

15 votes
1 answer
4k views

lambda calculus and category theory

10 votes
6 answers
3k views

Find a mistake in the following bogus proof

10 votes
2 answers
1k views

Is this a finite set for which it is impossible to list its elements?

8 votes
3 answers
3k views

Can every terminating rational number be approximated with a square root?

8 votes
3 answers
7k views

sum of irrational numbers - are there nontrivial examples?

8 votes
1 answer
3k views

bisectors of an angle in a triangle intersect at a single point - proof verification

8 votes
3 answers
1k views

proof by contradiction - making more than one assumption

7 votes
4 answers
989 views

What is wrong with this fake proof that subgroup of a cyclic group is cyclic?

7 votes
2 answers
3k views

harmonic series - generating function

5 votes
2 answers
231 views

Is $7k-9$ ever a power of $2$?

5 votes
7 answers
23k views

determining the maximum of a rational function

5 votes
5 answers
3k views

square-root of a transcendental number

4 votes
2 answers
256 views

learning how to write proofs properly

4 votes
2 answers
84 views

probability that a number defined by a random process is irrational

4 votes
1 answer
823 views

the smallest inaccessible cardinal

4 votes
3 answers
242 views

Is there a $3\times 3$ magic square adding up to $7$?

4 votes
3 answers
3k views

cardinal numbers and the power-set

4 votes
4 answers
236 views

Irrationality of a unique positive root of $\sin{x} = x^2$

4 votes
2 answers
183 views

Applying linear transformations to equations of curves

4 votes
2 answers
338 views

Is it important to be able to remember all proofs in my course?

3 votes
0 answers
209 views

ln(5) is irrational - proof verification

3 votes
2 answers
154 views

Starting with a string AB. Is it possible to obtain BA following these rules?

3 votes
1 answer
75 views

Can this integral similar to $\int_{-\infty}^{\infty} \frac{\sin(x)}{x} dx$ be evaluated?

3 votes
5 answers
207 views

If $z = \tan(\frac{x}{2})$, what is $\sin(x)$ and $\cos(x)$?

3 votes
4 answers
80 views

proof that the inequality $n (n-1)^n > n^n$ holds for all $n \ge 4$

3 votes
1 answer
377 views

irrationality measure

3 votes
2 answers
642 views

transcendental number theory - classification

3 votes
2 answers
2k views

Are all values of $\sin(x)$ algebraic.